{"id":"F2006B10120","name":"AD/G73/1 - Superseded by AD/G73/21","slug":"ad-g73-1-superseded-by-ad-g73-21","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55658,"registerId":"commonwealth-F2006B10120-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G73/1 - Superseded by AD/G73/21","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Frakes (Grumman) G73 Series Aeroplanes\n\n \n\nAD/G73/1 Superseded by AD/G73/21 NK\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"rejected","complexity_score":1,"rejection_reason":"This is a stub/navigation page indicating that AD/G73/1 has been superseded by AD/G73/21. It contains no substantive legislative content — only metadata, a document identifier, and a supersession notice. The actual operative provisions (the airworthiness requirements themselves) are not present in this fragment.","scope_assessment":{"changed":false,"description":"Not applicable — this is a navigation marker with no substantive scope to assess."},"complexity_factors":["Document is a stub/placeholder with no substantive legislative content","Contains only metadata (document ID, supersession notice, aircraft type)","No operative provisions, definitions, or conditional logic","No cross-references to other legislation (other than the replacement directive reference)"],"plain_english_summary":"This document is a **navigation marker** indicating that Airworthiness Directive AD/G73/1 has been replaced by a newer version, AD/G73/21.\n\n**What it is:**\n- An **Airworthiness Directive (AD)** is a mandatory safety notice issued by the Civil Aviation Safety Authority (CASA) requiring aircraft owners or operators to perform specific inspections, repairs, or modifications to address unsafe conditions.\n\n**What this specific entry tells us:**\n- The old directive **AD/G73/1** (which applied to **Frakes/Grumman G73 series aircraft** — a type of amphibious aeroplane) is no longer in force.\n- It has been **superseded** (replaced) by **AD/G73/21**.\n- The \"NK\" likely indicates the amendment status or classification.\n\n**Who it affects:**\n- Owners and operators of Grumman G73 Mallard aircraft registered in Australia.\n\n**Why it matters:**\n- Pilots and maintenance engineers need to know which safety requirements currently apply. This marker prevents confusion by clearly stating that the old directive should not be followed — the new one (AD/G73/21) contains the current rules.\n\n**In short:** This isn't the actual safety rule itself — it's a signpost telling aviation professionals to look elsewhere for the current requirements."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The entry records that AD/G73/1 has been superseded by AD/G73/21 (line: \"AD/G73/1 Superseded by AD/G73/21 NK\"). That means the legal obligations that were formerly expressed in AD/G73/1 are replaced and now governed by AD/G73/21. The schedule entry does not provide the substantive content of AD/G73/21, so whether the practical scope of regulatory obligations (e.g. new inspections, repair requirements, compliance windows) has expanded, narrowed or otherwise changed cannot be determined from this document alone."},"complexity_factors":["Document contains only an administrative supersession entry with no substantive requirements.","Effect is implemented by cross-reference to another instrument (AD/G73/21) rather than by text in this entry.","Ambiguous short code \"NK\" present without explanation in the entry.","Determining actual obligations requires retrieving and reading AD/G73/21, creating an external dependency."],"plain_english_summary":"What this document does, in plain terms:\n\n- This is an entry in the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives under the Civil Aviation Regulations 1998 (header: \"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES\").\n- It identifies the affected type as \"Frakes (Grumman) G73 Series Aeroplanes\" (line: \"Frakes (Grumman) G73 Series Aeroplanes\").\n- It records that Airworthiness Directive AD/G73/1 has been superseded by AD/G73/21 (line: \"AD/G73/1 Superseded by AD/G73/21 NK\").\n\nWho this affects:\n\n- Owners, operators, maintenance organisations and persons responsible for airworthiness of Frakes (Grumman) G73 Series aeroplanes. The entry indicates they should rely on AD/G73/21 rather than AD/G73/1 for current regulatory requirements (see the supersession statement).\n\nWhy it matters and how it works mechanically:\n\n- Mechanically, the document functions as a cross-reference within the official schedule: it withdraws the earlier directive AD/G73/1 from active effect and replaces it with AD/G73/21 for the listed aeroplane type (header and supersession line cited).\n- The document itself does not contain the operative technical requirements, deadlines, or the explanatory rationale for the change. To learn actual compliance obligations, costs or technical measures, affected parties must consult the full text of AD/G73/21.\n\nPractical compliance, cost and decision points (source-grounded):\n\n- Who pays: owners/operators of the Frakes (Grumman) G73 Series are the parties who would bear any direct costs arising from whatever remedial actions AD/G73/21 requires (inference from the fact the AD is for that aircraft type; see type line and supersession line).\n- Who decides: the Civil Aviation Safety Authority (CASA) is the issuing authority for the schedule entry (header). The schedule entry delegates the substantive requirements to the referenced AD (AD/G73/21).\n- Behaviour change: the only explicit change recorded here is that parties must treat AD/G73/21 as the controlling directive in place of AD/G73/1. The entry does not state what physical work, inspections, or paperwork are required.\n- Compliance burden & implementation risk: this schedule entry does not specify burden or risk; those depend entirely on the content of AD/G73/21. The entry creates a legal trigger to consult and comply with the new directive.\n\nNotes on source limits and trade-offs:\n\n- The document is a narrow administrative record of supersession. It does not provide the substantive standards, economic analysis, or transitional provisions. Any assessment of costs, incentives, market effects, or safety benefits requires inspecting AD/G73/21 itself.\n- The entry introduces a cross-reference dependency: compliance requires obtaining and following a separate instrument (AD/G73/21). That creates an information and administrative step for affected parties (supersession line cited)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g73-1-superseded-by-ad-g73-21","history":"/api/acts/ad-g73-1-superseded-by-ad-g73-21/history","analysis":"/api/acts/ad-g73-1-superseded-by-ad-g73-21/analysis","conflicts":"/api/acts/ad-g73-1-superseded-by-ad-g73-21/conflicts","importantCases":"/api/acts/ad-g73-1-superseded-by-ad-g73-21/important-cases","documents":"/api/acts/ad-g73-1-superseded-by-ad-g73-21/documents"}}